Lactic Acid
Lactic Acid is a food-grade organic acid and acidity regulator used by manufacturers for pH control, flavour balance, preservation support, buffering, microbial-control strategy support and process stability. It provides a mild, rounded acidic profile compared with sharper mineral acids and is widely evaluated in sauces, dressings, beverages, confectionery, dairy systems, meat and poultry systems, pickled products, prepared foods and fermentation-inspired formulations. This page is prepared as an industrial sourcing guide for concentration selection, assay review, source documentation, quality-control checks, packaging review and quotation requests.
Product identity
| Product | Lactic Acid |
|---|---|
| Common names | 2-Hydroxypropanoic Acid, Milk Acid, L-Lactic Acid, D-Lactic Acid, DL-Lactic Acid, Food Grade Lactic Acid, E270 |
| Category | Acidulants & Acidity Regulators |
| Function | Acidity regulator, acidulant, pH control agent, flavour-balancing ingredient, buffering ingredient and preservation-support acid |
| E / INS number | E270 where permitted and applicable |
| CAS / identity | 50-21-5 |
| Molecular profile | Organic alpha-hydroxy acid; commercial grades may differ by concentration, water content, stereoisomer profile and production route |
| Typical commercial strengths | Often supplied as concentrated aqueous solutions such as 80% or 88% grade, plus specialty buffered or dry forms depending on supplier |
| Typical form | Clear to slightly yellow liquid, concentrated solution, buffered liquid, powder on carrier, crystal, granule or customer-specific preparation |
| Industrial buying focus | Assay, concentration, stereoisomer ratio, fermentation source, colour, odour, pH, density, chloride, sulfate, ash, iron, heavy metals, microbial status, packaging compatibility, shelf life and batch traceability |
Application fit
Lactic Acid is selected when a formulation requires controlled acidity, a mild acid taste, pH adjustment, microbial hurdle support or compatibility with fermented, dairy, meat, sauce and savoury flavour systems.
- Beverages, soft drinks, fermented-style drinks and acidified drink bases
- Sauces, dressings, mayonnaise-style products, dips and condiments
- Confectionery, gummies, jellies, sour coatings and acid-sugar blends
- Pickled vegetables, olives, relishes and preserved vegetable systems
- Meat, poultry, seafood and ready-meal systems for pH and process support
- Dairy systems, cheese products, cultured-style desserts and plant-based alternatives
- Bakery, tortillas, fillings, fruit preparations and shelf-life-oriented formulas
- Brines, marinades, injection solutions and prepared-food acidification systems
Technical purchasing notes
When reviewing Lactic Acid, compare the supplier specification against the intended food application, pH target, total acidity, flavour profile, preservation strategy, thermal process, packaging material, label expectations and local rules. For industrial purchasing, the most useful inquiry includes target concentration, assay, stereoisomer profile, source requirement, physical form, packaging size, quantity, destination and document requirements.
Lactic Acid is valuable because it combines acidity with a relatively mild, dairy-like and fermented flavour note. Its antimicrobial support is linked to pH reduction and the undissociated acid fraction, but finished-product safety depends on the full hurdle system, including pH, water activity, heat treatment, preservatives, salt, sugar, packaging, cold chain, process hygiene and validated shelf-life data. It should not be treated as a stand-alone preservation guarantee.
Specification parameters to compare
| Parameter | Why it matters industrially | What to request from supplier |
|---|---|---|
| Assay / concentration | Controls dosing, pH adjustment, acidity contribution, cost-in-use, dilution calculations and batch consistency. | Assay percentage, titratable acidity method, concentration basis and COA result. |
| Stereoisomer profile | L-, D- and DL-lactic acid grades may differ by source, regulatory expectation, customer requirement and application positioning. | L/D ratio or optical purity where relevant, test method and declaration of L-lactic, D-lactic or DL-lactic acid grade. |
| Production route | Fermentation route, carbohydrate source and purification process influence sustainability claims, vegan status, GMO review and customer acceptance. | Fermentation or synthetic route statement, carbohydrate substrate, origin and GMO declaration. |
| Colour / APHA | Important for clear beverages, white sauces, dairy systems, confectionery, pickles and mild-colour products. | APHA/Hazen colour, visual standard and COA result. |
| Odour and flavour | Off-notes can affect beverages, dairy systems, dressings, sauces and confectionery. | Sensory description, odour standard, flavour suitability and retained reference sample. |
| pH and titratable acidity | Critical for formulation control, microbial hurdle design, process consistency and quality release. | pH at defined concentration, titration method and recommended dosage calculation method. |
| Density / specific gravity | Used for bulk liquid receiving, metering pump calibration, tank inventory and mass-volume conversion. | Density or specific gravity at defined temperature and temperature-correction guidance. |
| Chloride and sulfate | Residual inorganic ions can affect flavour, corrosion risk, customer specifications and process compatibility. | Chloride and sulfate limits with COA values. |
| Ash / residue on ignition | Indicates inorganic residue and purification quality. | Ash or residue-on-ignition limit, method and lot result. |
| Iron and heavy metals | Iron can cause colour instability or oxidation; heavy metals are required for food safety and import documentation. | Iron, lead, arsenic, cadmium, mercury and other relevant elemental impurity limits with COA or declaration. |
| Reducing substances / residual sugars | Residual carbohydrates may affect browning, fermentation claims, stability, microbial risk and customer specifications. | Reducing substances, residual sugars or carbohydrate residue statement where applicable. |
| Residual solvents or process residues | Relevant for certain manufacturing and purification routes, especially in customer audits. | Process residue declaration and solvent-residue data where applicable. |
| Microbiological status | Low pH limits many organisms, but food manufacturers may still require microbiological data for supplier approval. | Total plate count, yeast and mould, coliforms, E. coli, Salmonella or a microbiological suitability statement. |
| Packaging compatibility | Concentrated acid can attack unsuitable metals, seals or pumps and may discolor product if stored improperly. | Recommended packaging materials, tank compatibility, pump compatibility and storage temperature range. |
| Batch traceability | Essential for supplier approval, audits, complaint handling, export documentation and recall systems. | Lot number, production date, expiry or retest date, manufacturer name, origin and packing list. |
Application guidance by industry
| Industry / application | Technical role | Key validation points |
|---|---|---|
| Beverages and drink bases | Provides mild acidity, pH control and flavour balancing in fruit drinks, fermented-style beverages and acidified systems. | pH target, titratable acidity, flavour profile, mineral content, cloud stability, preservative system, pasteurization and packaging compatibility. |
| Sauces, dressings and condiments | Supports pH control, flavour rounding, acid balance and shelf-life hurdle design in oil-in-water and water-based products. | pH, salt, sugar, oil level, emulsifier system, preservative strategy, viscosity, heat treatment and microbial validation. |
| Meat, poultry and seafood systems | Used in marinades, brines, surface treatments or formulations where pH, flavour, tenderness or microbial hurdle support is required. | Protein functionality, water-holding capacity, colour, flavour, dosage, regulatory status, process validation and residue/label requirements. |
| Pickled vegetables and fermented-style foods | Provides acidification, flavour consistency and pH adjustment in pickles, olives, relishes and vegetable preserves. | Equilibrium pH, brine strength, salt level, texture, pasteurization, packaging, shelf-life pH drift and sensory balance. |
| Confectionery and gummies | Contributes sourness, pH adjustment and flavour profile in gummies, jellies, chewy candies, hard candies and acid-sugar blends. | Gel stability, pectin or gelatin compatibility, acid addition point, inversion risk, stickiness, moisture migration and sourness profile. |
| Dairy systems and cultured-style foods | Supports acidification, flavour, pH correction and process consistency in selected dairy, cheese and plant-based cultured-style products. | Protein stability, calcium balance, heat process, pH endpoint, syneresis, flavour, starter-culture interaction and label positioning. |
| Bakery, tortillas and fillings | Supports pH adjustment, flavour, mold-control strategy support and interaction with leavening, preservatives or fruit systems. | Dough pH, leavening balance, preservative synergy, water activity, texture, browning, filling stability and shelf-life data. |
| Ready meals and prepared foods | Used for pH correction, flavour rounding and shelf-life hurdle support in soups, meals, grains, sauces and protein systems. | Thermal process, pH mapping, buffering capacity, packaging, cold chain, microbial validation and final sensory profile. |
Processing and formulation considerations
- Define the pH and acidity target. Set both pH and titratable acidity targets because two products with the same pH can taste and preserve differently depending on buffering capacity.
- Calculate dosage by active concentration. A 50%, 80% or 88% grade changes dosage, water addition, acidity contribution and cost-in-use. Confirm assay and density before scale-up.
- Add acid at the correct process step. In confectionery, gels and protein systems, acid addition timing can affect gelation, protein stability, inversion, viscosity and texture.
- Consider buffering ingredients. Proteins, salts, minerals, starches, fibres and hydrocolloids can buffer the system and change the amount of acid needed to reach the target pH.
- Validate preservation as a complete hurdle system. Lactic Acid may support preservation, but finished-product safety depends on pH, water activity, heat treatment, packaging, hygiene, preservatives and storage.
- Check sensory balance. Lactic Acid is milder than some acids but can still add dairy, fermented or sour notes. Blend with citric, malic, acetic or other acids only where permitted and technically justified.
- Review equipment compatibility. Concentrated acid should be handled with compatible tanks, seals, hoses, pumps, valves and dosing systems.
- Confirm regulatory and label position. Verify permitted use, food category, maximum level, processing-aid vs ingredient status, final label wording and customer restrictions in the destination market.
For R&D teams
Request samples from the exact concentration and stereoisomer grade under review. Test pH response, titratable acidity, flavour profile, buffering capacity, microbial hurdle performance, protein stability, gel stability, packaging compatibility and process tolerance.
For QA teams
Build an approval file covering E270 status, CAS identity, assay, concentration, stereoisomer profile, production route, source material, colour, odour, chloride, sulfate, heavy metals, microbiology, allergens, GMO status and traceability.
For procurement teams
Compare offers by concentration, density, source, food-grade documentation, packaging type, minimum order quantity, lead time, shelf life, tank or IBC availability, freight classification and total delivered cost per active acid unit.
For production teams
Confirm receiving procedure, PPE, pump compatibility, dilution sequence, acid dosing accuracy, tank material, line flushing, spill response, corrosion monitoring and operator training before bulk use.
Quality-control and incoming inspection
A practical incoming inspection plan for Lactic Acid should include document review, packaging inspection, lot number verification, appearance check, odour check, concentration review, colour review and pH/titration confirmation where required. For bulk liquid users, density, receiving temperature and package integrity are also important.
- Visual check: confirm clear to slightly yellow liquid or declared dry form, with no foreign matter, phase separation, crystallization, leakage or packaging damage.
- Odour check: evaluate for expected mild acidic odour and absence of burnt, fermented, solvent-like, musty or contaminated notes.
- Assay check: review titration data and confirm active acid concentration against the purchase specification.
- Colour check: compare APHA/Hazen colour or visual colour against the approved standard, especially for beverage and dairy applications.
- pH response check: run an internal pH adjustment test in the target formulation or a defined model solution.
- Packaging check: confirm drum, IBC, tote or bulk tank integrity, seal condition, liner compatibility, label accuracy and lot coding.
Recommended documentation package
A complete industrial sourcing file for Lactic Acid should support supplier approval, import clearance, customer documentation, regulatory assessment, safety review and batch release.
- Product specification or technical data sheet
- Certificate of analysis for offered batch or representative lot
- Food-grade declaration
- E270 regulatory statement where applicable
- CAS 50-21-5 identity confirmation
- Assay and concentration data
- L-, D- or DL-lactic acid stereoisomer statement where required
- Fermentation or production-route statement
- Carbohydrate source or substrate declaration where available
- Colour, odour and sensory suitability statement
- Density or specific gravity data
- pH and titratable acidity method
- Chloride, sulfate, ash and iron data where specified
- Heavy metals and contaminant statement
- Residual sugars or reducing substances data where applicable
- Microbiological specification or suitability statement
- Safety data sheet
- Allergen declaration
- GMO statement
- Halal certificate where required
- Kosher certificate where required
- Vegan or vegetarian statement when needed
- Origin and manufacturer statement
- Shelf-life and storage recommendation
- Packaging compatibility and handling guidance
- Label draft and packaging details
- Pallet configuration, drum/IBC details and net/gross weight
- Country-of-origin and export documentation
Storage, handling and packaging
Lactic Acid should be stored in original sealed packaging in a clean, dry and well-ventilated area, away from incompatible materials, excessive heat, direct sunlight, metal contamination and strong odour sources. Concentrated liquid grades should be stored in compatible containers such as approved plastic drums, HDPE containers, IBCs, lined tanks or supplier-approved bulk systems. Avoid unverified contact with reactive metals and unsuitable seals.
Typical packaging may include plastic drums, HDPE jerrycans, IBC totes, bulk tankers, lined drums, pails, bottles or dry-grade bags/cartons depending on product form and order size. For industrial shipments, buyers should confirm active concentration, package material, UN/transport classification where applicable, net weight, pallet dimensions, seal type, shelf life at dispatch, batch coding, temperature limits, viscosity/density data and discharge requirements.
How to request this product
Send the product name, target concentration, grade, stereoisomer requirement, application, pH target, quantity, destination country, packaging preference, expected shipment date and required documents. If you already purchase Lactic Acid, attach your current specification, certificate of analysis, label, safety data sheet or application test results so alternatives can be compared more accurately.
Recommended inquiry details
- Product identity: Lactic Acid, E270, L-Lactic Acid, DL-Lactic Acid, 80% Lactic Acid, 88% Lactic Acid or the exact name used in your formula.
- Application: beverage, sauce, dressing, meat system, poultry system, seafood, confectionery, dairy, pickles, bakery, marinade, brine or prepared meal.
- Required grade: food-grade liquid, 80%, 88%, fermentation-derived, L-lactic, DL-lactic, buffered, dry grade, powder on carrier or customer-specific grade.
- Specification target: assay, pH, density, colour, stereoisomer profile, chloride, sulfate, ash, iron, heavy metals, residual sugars and microbiology.
- Process conditions: pH target, titratable acidity, heat process, packaging material, preservative system, water activity, salt level and intended shelf life.
- Quantity: laboratory sample, pilot order, monthly demand, annual contract, drum quantity, IBC quantity, tanker volume or container volume.
- Destination: country, port, Incoterms, required import documents and delivery schedule.
- Compliance needs: E270 declaration, halal, kosher, allergen, GMO, vegan, origin, contaminant, microbiology, SDS or customer-specific declarations.
Useful answers
What is Lactic Acid used for in food manufacturing?
Lactic Acid is used as an acidulant and acidity regulator for pH control, flavour balance, buffering and preservation-support systems. It is commonly reviewed for beverages, sauces, dressings, confectionery, meat and poultry systems, pickled foods, dairy systems and prepared foods.
Is Lactic Acid the same as E270?
Lactic Acid is associated with E270 where permitted and applicable. Buyers should confirm concentration, grade, stereoisomer profile, source, documentation and destination-market rules before use.
What concentration of Lactic Acid should I buy?
The correct concentration depends on dosing equipment, storage, dilution, pH target, transport, safety handling and cost-in-use. Common liquid grades include concentrated solutions, while some suppliers offer dry or buffered forms for specific applications.
What is the difference between L-lactic acid and DL-lactic acid?
L-lactic acid and D-lactic acid are stereoisomers, while DL-lactic acid is a mixture. The required profile depends on supplier process, customer specification, regulatory review, final food application and labelling expectations.
Can Lactic Acid preserve food by itself?
Lactic Acid can support preservation through pH reduction and acidification, but it should be validated as part of a complete hurdle system that may include heat treatment, water activity, preservatives, packaging, cold chain and hygiene controls.
Which specification parameters are most important?
Key parameters include assay, concentration, stereoisomer profile, source, colour, odour, pH, density, chloride, sulfate, ash, iron, heavy metals, residual sugars, reducing substances, microbiology, shelf life and batch traceability.
Can Global Food Additives source Lactic Acid?
Global Food Additives can review sourcing options for Lactic Acid according to target concentration, grade, physical form, application, quantity, destination country, packaging preference, shipment schedule and documentation requirements.
Which documents should be requested?
Buyers commonly request a technical data sheet, certificate of analysis, food-grade declaration, E270 statement where applicable, CAS identity confirmation, assay data, safety data sheet, allergen declaration, GMO statement, halal or kosher certificates when required, shelf-life information, label details and packing list.
Is this product permitted in every country?
No. Food additive use depends on destination-market rules, exact grade, food category, maximum use level, label requirements and buyer responsibility. The final manufacturer should confirm compliance before commercial production.
What information should I send for a quotation?
Send the product name, E number, concentration, grade, stereoisomer requirement, application, pH target, reference specification, quantity, destination country, packaging preference, Incoterms, expected shipment date and required documents. Sharing an existing COA or supplier specification helps compare alternatives faster.
Tell us which food additive or ingredient you need.
Send product names, target specifications, quantity, destination country, packaging preference, delivery term, and document requirements. Our team will review your inquiry and respond from orders@foodgradeadditives.com.
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